MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics 8.02 Fall 2007 Turn in at your table during class labeled with your name and group (e.g. L02 12A) Problem Set 8 Due: Wednesday, October 31stat class beginning (before 10:15/12:15) This problem set focuses on material from classes 18-20 (week 8). Textbook references can be found at the top of the summaries from these three days. Warm UpProblem 1: Charges in a Uniform Field An electron with velocity ˆˆxyvv+ijmoves through a uniform magnetic field ˆˆxyBB+ij(a)Find the magnitude of the force on the electron. (b)Repeat your calculation for a proton having the same velocity. Problem 2: Power Line A horizontal power line carries a current of Ifrom south to north. Earth's magnetic field (BEarth= 62.1 μT) is directed toward the north and is inclined downward at an angle θto the horizontal. Find the magnitude of the magnetic force on a length Lof the line due to Earth's field. Please also calculate a value numerically for I= 3000 A, θ= 78.0º and L= 100 m, since it’s useful to think about real world numbers. Problem 3: Triangular Loop A current loop, carrying a current I, is in the shape of a right triangle with sides 30, 40, and 50 cm. The loop is in a uniform magnetic field Bwhose direction is parallel to the current in the 50 cm side of the loop. Find the magnitude of (a)the magnetic dipole moment of the loop in amperes-square meters; and (b)the torque on the loop. PS08-1
has intentionally blurred sections.
Sign up to view the full version.